Aqueous CTAB‐Assisted Electrodeposition of Gold Atomic Clusters and Their Oxygen Reduction Electrocatalytic Activity in Acid Solutions

Jeyabharathi, C.; S, Senthil Kumar; Kiruthika, G.V.M.; Phani, K. L. N.

doi:10.1002/anie.200905614

Cited by 77 publications

(36 citation statements)

References 35 publications

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“…For that, we carried out the oxime formation from 8 with catalytic amounts of palladium(II) chloride, gold(I) chloride, soluble palladium nanoparticles, and gold nanoparticles (see Figure 5C) but none of them improved the formation of oxime from 8. [25][26][27] However, the reaction occurred in good extent when we used a sample of Au/CeO 2 containing leachable sub-nanometric gold clusters. 26 Soluble sub-nanometric gold clusters have recently show extremely high catalytic activities for hydration reactions 28 and since gold nanoparticles were not active, the catalytic activity of Au/CeO 2 suggests that gold clusters might be involved in the hydrolysis of 8 to cyclohexanone 9.…”

Section: Figurementioning

confidence: 99%

One pot synthesis of cyclohexanone oxime from nitrobenzene using a bifunctional catalyst

et al. 2014

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Section: Figurementioning

confidence: 99%

One pot synthesis of cyclohexanone oxime from nitrobenzene using a bifunctional catalyst

et al. 2014

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“…However, the extremely small sizes and high surface energy lead to the degradation of the M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 durability of metal clusters because of the deficiency of dissolution, aggregation, and sintering during catalysis reactions [24,25]. Synthesis of metal nanoclusters on a support is believed to stabilize nanoclusters and improve catalytic performance [26].…”

Section: Introductionmentioning

confidence: 99%

Stable silver nanoclusters electrochemically deposited on nitrogen-doped graphene as efficient electrocatalyst for oxygen reduction reaction

Jin

Chen

Dong

et al. 2015

Journal of Power Sources

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“…Carbon nanoelectrodes can also be used to probe the catalytic activity of low-atomicity gold clusters, [20] (Au x , 2< x < 13, with Au 5 being the principal species; [21] see the Supporting Information). Very small Au clusters can act as active chemical catalysts [20b] and electrocatalysts, [20c, 21, 22] thus representing an intriguing intermediate case between molecular and heterogeneous catalysis.…”

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confidence: 99%

Electrochemistry and Electrocatalysis at Single Gold Nanoparticles Attached to Carbon Nanoelectrodes

Gao

et al. 2014

ChemElectroChem

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Electrochemical experiments at individual metal nanoparticles (NPs) can provide new insights into their electrocatalytic behavior. In this Communication, we report the preparation of nanometer-sized carbon electrodes and their use as substrates for the immobilization of single gold NPs (AuNPs). In addition to its very small size, the surface of a carbon nanoelectrode is catalytically inert, which makes it an excellent substrate for studying electrocatalytic reactions. The activity of single AuNPs towards the hydrogen evolution reaction was investigated and compared to that of low-atomicity gold clusters. Three approaches to attaching AuNPs to either chemically modified or bare carbon nanoelectrodes, and the effects of immobilization on hydrogen adsorption and catalytic behavior of AuNPs are discussed. The developed methodology should be useful for studying the effects of NP size, geometry, and surface attachment on the electrocatalytic activity.Metal nanoparticles (NPs) have attracted a great deal of research interest because of their unique physical and chemical properties. They are extensively utilized as catalysts, owing to their high surface-area-to-mass ratio. Understanding the relationship between the size and structure of a NP and its catalytic activity is essential for fundamental advances in electrocatalysis and technological applications. [1][2][3][4][5][6][7] In most published stud-ies, the use of a large ensemble of particles obscures the effects of variations in NP size, shape, orientation, and local environment on the catalytic activity.Different electrochemical strategies have been proposed to perform experiments at single NPs, [3c] most of which focus on monitoring current transients produced by collisions of a metal particle with a micrometer-sized electrode. [8, 9] Xiao and Bard were the first to detect the landing of catalytic NPs on the microelectrode surface. [8a] Compton and co-workers used the particle collision method to determine the size distribution and concentration of NPs by measuring the charge transferred in the current transient. [10] Such experiments provided information about transport processes and collision dynamics rather than electron transfer (ET) or catalytic reactions.To access chemical information at a single metal NP, one can attach it to the surface of a nanometer-sized electrode, which has to be sufficiently small to eliminate the possibility of multi-NP binding. [11] In this way, Zhang and co-workers probed the oxygen reduction reaction and the underpotential deposition of Cu at a gold NP (AuNP) attached to the Pt nanoelectrode. [12] This work also showed the importance of using catalytically inert substrate materials in single NP experiments; although well-shaped steady-state voltammograms and chronoamperometric transients were obtained, it was difficult to differentiate between the currents flowing at the AuNP and the underlying Pt surface.We have previously studied AuNPs attached to glass [13a] and carbon nanopipettes, [13b] but no isolated single particles at...

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Aqueous CTAB‐Assisted Electrodeposition of Gold Atomic Clusters and Their Oxygen Reduction Electrocatalytic Activity in Acid Solutions

Cited by 77 publications

References 35 publications

One pot synthesis of cyclohexanone oxime from nitrobenzene using a bifunctional catalyst

One pot synthesis of cyclohexanone oxime from nitrobenzene using a bifunctional catalyst

Stable silver nanoclusters electrochemically deposited on nitrogen-doped graphene as efficient electrocatalyst for oxygen reduction reaction

Electrochemistry and Electrocatalysis at Single Gold Nanoparticles Attached to Carbon Nanoelectrodes

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